Subwoofer



FIG. 1 is a perspective view of a subwoofer showing my new and ornamental design,

FIG. 2 is a front view thereof,

FIG. 3 is a rear view thereof,

FIG. 4 Is a first side view thereof,

FIG. 5 is an opposite, second side view thereof,

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM The ornamental design for a subwoofer, as shown and described. 